CN110345177B - Disc brake and control method - Google Patents

Disc brake and control method Download PDF

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Publication number
CN110345177B
CN110345177B CN201910646881.7A CN201910646881A CN110345177B CN 110345177 B CN110345177 B CN 110345177B CN 201910646881 A CN201910646881 A CN 201910646881A CN 110345177 B CN110345177 B CN 110345177B
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China
Prior art keywords
piston
limiting block
braking part
sub
brake
Prior art date
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Application number
CN201910646881.7A
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Chinese (zh)
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CN110345177A (en
Inventor
张步坤
刘佳
秦建军
白永安
胡德利
荆立格
魏立梅
刘鑫
唐海岩
潘腾腾
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Weichai Lovol Intelligent Agricultural Technology Co Ltd
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Weichai Lovol Intelligent Agricultural Technology Co Ltd
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Priority to CN201910646881.7A priority Critical patent/CN110345177B/en
Publication of CN110345177A publication Critical patent/CN110345177A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/02—Fluid pressure
    • F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention provides a disc brake and a control method, wherein the disc brake comprises the following components: the shell is provided with a first piston braking part and a second piston braking part in a sliding way, and a hydraulic oil way is arranged in the shell; the pressure sensor is arranged in the hydraulic oil circuit; the controller is electrically connected with the pressure sensor; and the alarm device is electrically connected with the controller, and the first piston braking part and the second piston braking part can be clamped with the two sides of the brake disc under the action of hydraulic oil in the hydraulic oil way so as to realize braking. According to the disc brake provided by the invention, when the first piston braking part and the second piston braking part are seriously worn, the first piston braking part and the second piston braking part still cannot brake effectively after moving for the maximum stroke, and the hydraulic pressure in the hydraulic oil way is greater than the preset value, the alarm device is controlled to alarm, so that a user can replace the first piston braking part and the second piston braking part in time.

Description

Disc brake and control method
Technical Field
The invention relates to the technical field of agricultural machinery, in particular to a disc brake and a control method.
Background
A brake refers to a component that generates a braking torque to counteract a force of a vehicle movement or movement tendency. Currently, friction brakes are used in automobiles, which utilize friction between a stationary element and a working surface of a rotating element to generate a braking torque.
The brake caliper of the hydraulic disc brake is generally arranged on the inner side of the brake, two opposite hydraulic cylinders are arranged in pairs, and oil paths between the opposite hydraulic cylinders are communicated. During braking, the piston is pushed towards the brake disc under the action of hydraulic pressure. The friction blocks on both sides of the brake disc clamp the brake disc under the action of hydraulic pressure, so that braking torque with opposite movement directions is generated on the brake disc, and the rotating device is driven to brake, which is more commonly used in engineering machinery products and even agricultural machinery.
In the prior art, after the brake block is worn, a user is required to judge when the brake block needs to be replaced according to the use experience, and accidents are easy to happen due to the fact that the brake block is not replaced in time.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
In view of the above, an object of the present invention is to provide a disc brake.
An object of the present invention is to provide a control method for the above-described disc brake.
In order to achieve the above object, a first aspect of the present invention provides a disc brake, including: the casing, the casing slip is provided with first piston braking portion and second piston braking portion, includes in the casing: the shell is provided with a first piston braking part and a second piston braking part in a sliding way, and a hydraulic oil way is arranged in the shell; the pressure sensor is arranged in the hydraulic oil circuit; the controller is electrically connected with the pressure sensor; and the alarm device is electrically connected with the controller, and the first piston braking part and the second piston braking part can be clamped with the two sides of the brake disc under the action of hydraulic oil in the hydraulic oil way so as to realize braking.
In this scheme, when disc brake braking, rely on the frictional force between first piston braking portion and second piston braking portion and the brake disc to realize the braking. Before braking is completed, the hydraulic pressure in the hydraulic oil passage continues to increase friction between the first and second piston brake portions and the brake disc. When the first piston braking part and the second piston braking part are seriously worn, the first piston braking part and the second piston braking part still cannot effectively brake after moving for the maximum stroke, the hydraulic pressure in the hydraulic oil path is continuously increased until the hydraulic pressure in the hydraulic oil path is larger than a preset value, and the controller controls the alarm device to alarm after acquiring the hydraulic pressure in the hydraulic oil path through the pressure sensor, so that a user can conveniently replace the first piston braking part and the second piston braking part in time, and the possibility of accidents caused by overlarge wear of the first piston braking part and the second piston braking part is reduced.
In the above technical solution, preferably, the method further includes: the first position sensor is fixedly arranged on the shell and arranged on one side, far away from the brake disc, of the first piston braking part, and is electrically connected with the controller.
In any of the above embodiments, preferably, the method further includes: the second position sensor is fixedly arranged on the shell and arranged on one side of the second piston braking part far away from the braking disc, and the second position sensor is electrically connected with the controller.
In any of the above embodiments, preferably, the method further includes: the two sides of the first return device are respectively connected with the first piston braking part and the shell; the two sides of the second return device are respectively connected with the second piston braking part and the shell, wherein when the first piston braking part and the second piston braking part are clamped with the two sides of the brake disc, the deformation of the first return device and the second return device is increased; after the hydraulic oil way is depressurized, the first return device and the second return device can recover deformation and drive the first piston braking part and the second piston braking part to move in the direction away from the brake disc.
In any of the above aspects, preferably, the first return means includes: the first limiting block is movably arranged in the first return groove; and two ends of the first elastic piece are respectively abutted with the side walls of the first limiting block and the first return groove, wherein during braking, the first limiting block is limited by the shell and matched with the first piston braking part to extrude the first elastic piece.
In any of the above embodiments, preferably, the housing includes: the first piston braking part is arranged in the first caliper body in a sliding way; the second caliper body is fixedly connected with the first caliper body, the second piston braking part is arranged in the second caliper body in a sliding mode, a first check ring is arranged in the first caliper body, and two sides of the first limiting block are respectively abutted to the first check ring and the first elastic piece.
In any of the above aspects, preferably, the second return means includes: the second limiting block is movably arranged in the second return groove; and two ends of the second elastic piece are respectively abutted with the side walls of the second limiting block and the second return groove, wherein during braking, the second limiting block is limited by the second caliper body and matched with the second piston braking part to extrude the second elastic piece.
In any of the above technical solutions, preferably, a second retainer ring is disposed in the second caliper body, and one side of the second stopper, which is far away from the second piston braking portion, abuts against the second retainer ring.
In any of the above aspects, preferably, the first piston brake includes: the first caliper piston is arranged in the shell in a sliding manner; the first brake block is fixedly arranged at one end of the first caliper piston, which is close to the brake disc, and the hydraulic oil circuit can drive the first caliper piston to move so as to enable the first brake block to be attached to one end of the brake disc; after the hydraulic oil way is depressurized, the first return device drives the first caliper piston to slide in a direction away from the brake disc, so that the first brake block is separated from the brake disc.
In any of the above aspects, preferably, the second piston brake includes: the second caliper piston is arranged in the shell in a sliding manner; the second brake block is fixedly arranged at one end of the second caliper piston, which is close to the brake disc, and the hydraulic oil circuit can drive the second caliper piston to move so as to enable the second brake block to be attached to one end of the brake disc; after the hydraulic oil way is depressurized, the second return device drives the second caliper piston to slide in a direction away from the brake disc, so that the second brake block is separated from the brake disc.
A second aspect of the present invention provides a control method for a disc brake according to any one of the first aspect, the control method including: acquiring oil pressure in a hydraulic oil way through a pressure sensor; when the oil pressure is larger than a first preset value, the controller controls the alarm device to send out first alarm information.
In this scheme, when the oil pressure is greater than the default, the controller control alarm device sends first alarm information to can in time remind the user when first piston braking portion and second piston braking portion wearing and tearing are serious.
In the above aspect, preferably, when the disc brake is provided with the first position sensor 130, the control method further includes: acquiring a stroke value of a first piston braking part through a first position sensor; when the travel value is larger than a second preset value, the controller controls the alarm device to send out second alarm information.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic illustration of a disc brake configuration according to one embodiment of the present invention;
fig. 2 is a partial schematic structural view of a disc brake according to an embodiment of the present invention.
The correspondence between the reference numerals and the component names in fig. 1 is:
10 casing, 11 first caliper body, 111 first retaining ring, 12 second caliper body, 121 second retaining ring, 21 first caliper piston, 22 first brake pad, 31 second caliper piston, 32 second brake pad, 41 first hydraulic circuit, 42 second hydraulic circuit, 511 first sub-stopper, 512 second sub-stopper, 52 first elastic member, 611 third sub-stopper, 612 fourth sub-stopper, 62 second elastic member, 70 first sealing ring, 80 second sealing ring, 90 piston dust cover, 100 brake disc center, 120 pressure sensor, 130 first position sensor, 140 first hydraulic chamber, 150 second hydraulic chamber.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
Some embodiments according to the present invention are described below with reference to fig. 1.
As shown in fig. 1, an embodiment of a first aspect of the present invention provides a disc brake including: the housing 10 is slidably provided with a first piston brake and a second piston brake, and the housing 10 includes: the shell 10 is provided with a first piston braking part and a second piston braking part in a sliding way in the shell 10, and a hydraulic oil way is arranged in the shell 10; the pressure sensor 120 is arranged in the hydraulic oil circuit; a controller electrically connected to the pressure sensor 120; and the alarm device is electrically connected with the controller, and the first piston braking part and the second piston braking part can be clamped with the two sides of the brake disc under the action of hydraulic oil in the hydraulic oil way so as to realize braking.
In this scheme, when disc brake braking, rely on the frictional force between first piston braking portion and second piston braking portion and the brake disc to realize the braking. Before braking is completed, the hydraulic pressure in the hydraulic oil passage continues to increase friction between the first and second piston brake portions and the brake disc. When the first piston braking part and the second piston braking part are seriously worn, the first piston braking part and the second piston braking part still cannot be effectively braked after moving for the maximum stroke, the hydraulic pressure in the hydraulic oil path is continuously increased until the hydraulic pressure in the hydraulic oil path is larger than a preset value, and the controller controls the alarm device to alarm after acquiring the hydraulic pressure in the hydraulic oil path through the pressure sensor 120, so that a user can conveniently replace the first piston braking part and the second piston braking part in time, and the possibility of accidents caused by overlarge wear of the first piston braking part and the second piston braking part is reduced.
In the above embodiment, preferably, the method further includes: the first position sensor 130 is fixedly arranged on the shell 10 and arranged on one side of the first piston braking part far away from the brake disc, and the first position sensor 130 is electrically connected with the controller.
In this scheme, the first position sensor 130 can detect the initial position of the first piston braking portion under the non-braking state and the extreme position under the braking state, and then can confirm the stroke of the first piston braking portion, when the wear of the first piston braking portion is great, the stroke of the first piston braking portion when braking is increased, and when the stroke of the first piston braking portion is greater than the preset stroke, the wear of the first piston braking portion is great at this moment, and the controller controls the alarm device to give an alarm to remind the user to replace the first piston braking portion in time.
In any of the foregoing embodiments, preferably, the method further includes: the second position sensor is fixedly arranged on the shell 10 and arranged on one side of the second piston braking part far away from the braking disc, and the second position sensor is electrically connected with the controller.
In this scheme, the second position sensor can detect the initial position of second piston brake portion under non-braking state and the extreme position under the braking state, and then can confirm the stroke of second piston brake portion, and when second piston brake portion wearing and tearing are great, the stroke of second piston brake portion when braking increases, and when the stroke of second piston brake portion is greater than preset stroke, second piston brake portion wearing and tearing are great this moment, and the controller control alarm device reports to the police to in time remind the user to change second piston brake portion.
In this embodiment, the model of the position sensor is PY-2-F-025, the controller is STM32F101 type singlechip, and the alarm device is a loudspeaker.
In any of the foregoing embodiments, preferably, the method further includes: the first return device, both sides of which are connected with the first piston braking part and the shell 10 respectively; the two sides of the second return device are respectively connected with the second piston braking part and the shell 10, wherein when the first piston braking part and the second piston braking part are clamped with the two sides of the brake disc, the deformation of the first return device and the second return device is increased; after the hydraulic oil way is depressurized, the first return device and the second return device can recover deformation and drive the first piston braking part and the second piston braking part to move in the direction away from the brake disc.
In the scheme, during braking, the hydraulic oil circuit drives the first piston braking part and the second piston braking part to move towards the braking disc together through hydraulic pressure, so that the first piston braking part and the second piston braking part are clamped on two sides of the braking disc, and braking is realized. When braking is needed to be stopped, the hydraulic oil way is depressurized, the first piston braking part moves in a direction away from the brake disc under the action of the first return device, the second piston braking part moves in a direction away from the brake disc under the action of the second return device, and at the moment, the first piston braking part and the second piston braking part move in opposite directions so as to separate the first piston braking part and the second piston braking part from the brake disc.
By arranging the first return device and the second return device, the quick automatic return of the disc brake can be realized, unnecessary abrasion of the first piston braking part and the second piston braking part is reduced, and the service life is prolonged; but also can maintain effective braking performance and has high working reliability. Meanwhile, the disc brake in the scheme has the advantages of simple structure, quick return, sensitive braking, convenient maintenance, low cost, low requirement on machining precision and convenience for large-scale application.
In one embodiment of the present invention, the first return device is a spring, two ends of the spring are hooked on the first piston braking portion and the housing 10 respectively, when the disc brake brakes, the first piston braking portion moves towards the direction close to the brake disc, at this time, the first return device deforms and stretches, and when the hydraulic oil way is depressurized, the first return device contracts to drive the first piston braking portion to slide towards the direction away from the brake disc.
In one embodiment of the present invention, the second return device is a spring, two ends of the spring are hooked on the second piston braking portion and the housing 10 respectively, when the disc brake brakes, the second piston braking portion moves towards the direction close to the brake disc, at this time, the second return device deforms and stretches, and when the hydraulic oil way is depressurized, the second return device contracts to drive the second piston braking portion to slide towards the direction away from the brake disc.
The first return device may be connected to the housing 10 and the first piston braking portion by an abutting, hooking or connecting method. Similarly, the second return device may be connected to the housing 10 and the second piston braking portion by an abutting, hooking or connecting.
In the above embodiment, preferably, the first return means includes: the first limiting block is movably arranged in the first return groove; and two ends of the first elastic piece 52 are respectively abutted against the side walls of the first limiting block and the first return groove, wherein during braking, the first limiting block is limited by the shell 10 and matched with the first piston braking part to press the first elastic piece 52.
In this embodiment, the first return device includes a first stopper and a first elastic member 52. The first limiting block is annular and sleeved in the first return groove so as to realize movable setting of the first limiting block in the first return groove. The first stopper and the first elastic member 52 abut against each other, and a side of the first stopper away from the first elastic member 52 abuts against the housing 10, and a side of the first elastic member 52 away from the first stopper abuts against the first piston stopper. When the disc brake brakes, the first piston brake portion moves in a direction approaching the brake disc, the housing 10 restricts movement of the first stopper in the axial direction of the first piston brake portion, the first brake pad 22 and the first piston brake portion compress the first elastic member 52 together, and the first elastic member 52 is compressed. When the hydraulic oil path is depressurized, the first elastic member 52 recovers the deformation and stretches to drive the first piston braking portion to slide in a direction away from the brake disc.
The scheme of the embodiment has less influence on the original structure of the disc brake, and is more convenient to design and manufacture.
In any of the foregoing embodiments, preferably, the first stopper includes: the first sub-limiting block 511 and the second sub-limiting block 512 which are semi-annular are abutted against the bottom of the shell 10 and the first return groove in the radial direction of the first piston braking portion, the first sub-limiting block 511 and the second sub-limiting block 512 are abutted against the axial direction of the first piston braking portion to be spliced into an annular first limiting block, the first sub-limiting block 511 and the second sub-limiting block 512 are abutted against the first elastic piece 52, the first sub-limiting block 511 and the second sub-limiting block 512 are abutted against each other in the circumferential direction of the first piston braking portion, and during braking, the first sub-limiting block 511 and the second sub-limiting block 512 are limited by the shell 10 in the axial direction of the first piston braking portion and are matched with the first piston braking portion to press the first elastic piece 52.
In this scheme, through setting up semi-annular first sub-stopper 511 and second sub-stopper 512, the loading and unloading of first stopper is more convenient.
In any of the above embodiments, preferably, the housing 10 includes: a first caliper body 11, in which a first piston brake is slidably disposed in the first caliper body 11; the second caliper body 12 is fixedly connected with the first caliper body 11, and the second piston braking portion is slidably arranged in the second caliper body 12, wherein a first check ring 111 is arranged in the first caliper body 11, and one side, away from the first elastic piece 52, of the first sub-limiting block 511 and the second sub-limiting block 512 abuts against the first check ring 111.
In this scheme, the first and second sub-stoppers 511 and 512 abut against the first retainer ring 111 to realize the abutment of the first and second sub-stoppers 511 and 512 with the housing 10.
In any of the above embodiments, preferably, the first piston brake includes: a first caliper piston 21 slidably disposed within the housing 10; the first brake block 22 is fixedly arranged at one end of the first caliper piston 21, which is close to the brake disc, and after the hydraulic oil way is pressurized, the first caliper piston 21 is driven to move so as to enable the first brake block 22 to be attached to one end of the brake disc; after the hydraulic oil way is depressurized, the first return device drives the first caliper piston 21 to slide in a direction away from the brake disc, so that the first brake block 22 is separated from the brake disc.
Specifically, a first sliding cavity is arranged in the first caliper body 11, and the bottom of the first sliding cavity is communicated with a hydraulic oil way. The first caliper piston 21 is embedded in and slidable along the first slide chamber. The side wall of the first sliding cavity, which is close to one side of the brake disc, is provided with an annular groove, and the first retainer ring 111 is embedded and fastened in the annular groove. The first and second sub-stoppers 511 and 512 are engaged with the side wall of the first sliding chamber and abut against the side of the first retainer ring 111 near the first caliper piston 21. The first caliper piston 21 passes through the first stopper and can slide along the first sliding chamber. Both ends of the first elastic member 52 are abutted against the first caliper piston 21 and the first stopper, respectively. The first caliper piston 21 is fixedly connected to the first brake pad 22 on the side close to the clamping disc. A second seal ring 80 (e.g., a rectangular seal ring) is provided on a side wall of the first sliding chamber.
During braking, the hydraulic oil way is pressurized, hydraulic oil in the hydraulic oil way is injected into the bottom of the first sliding cavity, the first caliper piston 21 moves to one side of the brake disc under the action of the hydraulic oil, the first elastic piece 52 is compressed, and the second sealing ring 80 can prevent the hydraulic oil from leaking in the moving process of the first caliper piston 21. When the hydraulic oil path is depressurized, hydraulic oil flows back into the oil tank, and the first elastic piece 52 is deformed and stretched to drive the first caliper piston 21 to move in a direction away from the brake disc.
It should be noted that, the first caliper body 11 may further be provided with an integrally formed protrusion and abuts against the first limiting block, so as to realize limiting of the first limiting block.
In any of the above embodiments, preferably, the second return means comprises: the second limiting block is movably arranged in the second return groove; and the two ends of the second elastic piece 62 are respectively abutted with the side walls of the second limiting block and the second return groove, wherein during braking, the second limiting block is limited by the second caliper body 12 and matched with the second piston braking part to extrude the second elastic piece 62.
In this embodiment, the second return device includes a second stopper and a second elastic member 62. The second limiting block is annular and sleeved in the second return groove so as to realize movable setting of the second limiting block in the second return groove. The second stopper and the second elastic member 62 abut against each other, and a side of the second stopper away from the second elastic member 62 abuts against the housing 10, and a side of the second elastic member 62 away from the second stopper abuts against the second piston stopper. When the disc brake brakes, the second piston brake portion moves in a direction approaching the brake disc, the second caliper body 12 restricts movement of the second stopper in the axial direction of the second piston brake portion, the second brake pad 32 and the second piston brake portion compress the second elastic member 62 together, and the second elastic member 62 is compressed. When the hydraulic oil path is depressurized, the second elastic member 62 recovers the deformation and stretches to drive the second piston braking portion to slide in a direction away from the brake disc.
In any of the above embodiments, preferably, a second retainer ring 121 is disposed in the second caliper body 12, and a side of the second stopper, which is far away from the second piston braking portion, abuts against the second retainer ring 121.
In any of the foregoing embodiments, preferably, the second stopper includes: the third sub-limiting block 611 and the fourth sub-limiting block 612 which are semi-annular are abutted against the bottoms of the second caliper body 12 and the second return groove in the radial direction of the second piston braking portion, the third sub-limiting block 611 and the fourth sub-limiting block 612 are abutted against the periphery of the second piston braking portion to splice out the annular second limiting block, wherein the third sub-limiting block 611 and the fourth sub-limiting block 612 are abutted against the first elastic piece 52, and during braking, the third sub-limiting block 611 and the fourth sub-limiting block 612 are limited by the second caliper body 12 in the axial direction of the second piston braking portion and are matched with the second piston braking portion to extrude the second elastic piece 62.
In any of the above embodiments, preferably, the second piston brake includes: a second caliper piston 31 slidably disposed within the housing 10; the second brake block 32 is fixedly arranged at one end of the second caliper piston 31, which is close to the brake disc, and the hydraulic oil circuit can drive the second caliper piston 31 to move so as to enable the second brake block 32 to be attached to one end of the brake disc; after the hydraulic oil way is depressurized, the second return device drives the second caliper piston 31 to slide in a direction away from the brake disc, so that the second brake block 32 is separated from the brake disc.
Specifically, a second sliding cavity is arranged in the second caliper body 12, and the bottom of the second sliding cavity is communicated with the hydraulic oil way. The second caliper piston 31 is embedded in and slidable along the second sliding chamber. The side wall of the second sliding cavity, which is close to one side of the brake disc, is provided with an annular groove, and the second check ring 121 is embedded and fastened in the annular groove. The second sub-stopper 512 and the second sub-stopper 512 are engaged with the side wall of the second sliding chamber and abut against the side of the second retainer ring 121 near the second caliper piston 31. The second caliper piston 31 passes through the second stopper and can slide along the second sliding chamber. Both ends of the second elastic member 62 are abutted against the second caliper piston 31 and the second stopper, respectively. The second caliper piston 31 is fixedly connected to the second brake pad 32 on the side close to the clamping disc. A second seal ring 80 (e.g., a rectangular seal ring) is provided on a side wall of the second sliding chamber.
During braking, hydraulic oil in the hydraulic oil circuit is injected into the bottom of the second sliding cavity, the second caliper piston 31 moves to one side of the brake disc under the action of the hydraulic oil, the second elastic piece 62 is compressed, and the second sealing ring 80 can prevent the hydraulic oil from leaking in the moving process of the second caliper piston 31. When the hydraulic oil path is depressurized, hydraulic oil flows back into the oil tank, and the second elastic member 62 recovers the deformation and extends to drive the second caliper piston 31 to move in a direction away from the brake disc.
It should be noted that, an integrally formed protrusion may be further disposed in the second caliper body 12 and abuts against the second limiting block, so as to realize limiting of the second limiting block.
In any of the above embodiments, preferably, the hydraulic oil passage includes: a first hydraulic oil path 41 provided in the first caliper body 11, and a first hydraulic chamber 140 formed between the first piston brake portion and the first caliper body 11 communicates with the first hydraulic oil path 41; the second hydraulic oil path 42 is provided in the second caliper body 12 and communicates with the first hydraulic oil path 41, and a second hydraulic chamber 150 formed by the second piston brake portion and the second caliper body 12 communicates with the second hydraulic oil path 42.
Further, a first seal ring 70 is provided at a connection position of the first hydraulic oil passage 41 and the second hydraulic oil passage 42 to prevent leakage of hydraulic oil.
In this embodiment, the hydraulic oil path is communicated with the oil pump and the oil tank through a two-position three-way valve. When the two-position three-way valve is located at the first position, the hydraulic oil path is communicated with the oil pump, the first caliper piston 21 and the second caliper piston 31 move in opposite directions under the action of hydraulic oil, and the first brake block 22 and the second brake block 32 are clamped on two sides of the brake disc so as to realize braking. After the two-position three-way valve is switched to the second position, the hydraulic oil way is communicated with the oil tank, hydraulic oil in the hydraulic oil way flows into the oil tank, and meanwhile, the oil outlet of the oil pump is communicated with the oil tank through the overflow valve so as to keep the pressure constant.
In another embodiment of the present invention, the stroke of the first caliper piston 21 is greater than the spacing between the first caliper piston 21 and the first stop block, so that the first brake pad 22 still works properly when worn.
In another embodiment of the present invention, the stroke of the second caliper piston 31 is greater than the spacing between the second caliper piston 31 and the second stop block, so that the second brake pad 32 still works properly when worn.
An embodiment of a second aspect of the present invention provides a control method for a disc brake in any one of the first aspect, the control method including: acquiring the oil pressure in the hydraulic oil path by the pressure sensor 120; when the oil pressure is larger than a first preset value, the controller controls the alarm device to send out first alarm information.
In this scheme, when the oil pressure is greater than the default, the controller control alarm device sends first alarm information to can in time remind the user when first piston braking portion and second piston braking portion wearing and tearing are serious.
Further, the control method further includes: when the oil pressure is greater than a third preset value, the starting circuit of the agricultural machine is disconnected after the agricultural machine is flameout so as to prevent the agricultural machine from starting, wherein the third preset value is greater than the second preset value.
In this scheme, when the oil pressure is greater than the third default, the wearing and tearing of first piston brake portion and second piston brake portion are very serious this moment, and agricultural machinery can not normally brake yet. At this time, the starting circuit of the farm machine is disconnected after the farm machine is flameout, or the starting device of the farm machine is locked, so that the starting of the farm machine is prevented, and the danger is prevented.
In the above aspect, preferably, when the disc brake is provided with the first position sensor 130, the control method further includes: acquiring a stroke value of the first piston brake by the first position sensor 130; and when the travel value is larger than a second preset value, sending out second alarm information through the alarm device.
Specifically, the initial position of the first piston brake part in the non-braking state and the limit position of the first piston brake part in the braking state are obtained through the first position sensor 130, the stroke of the first piston brake part is determined according to the distance between the initial position and the limit position, when the first piston brake part is worn out more, the stroke of the first piston brake part in braking is increased, when the stroke of the first piston brake part is larger than the preset stroke, the first piston brake part is worn out more at the moment, the controller controls the alarm device to give an alarm, and the user is reminded of replacing the first piston brake part in time.
In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A disc brake, comprising:
the device comprises a shell (10), wherein a first piston braking part and a second piston braking part are arranged in the shell (10) in a sliding manner, and a hydraulic oil way is arranged in the shell (10);
a pressure sensor (120) provided in the hydraulic oil passage;
a controller electrically connected to the pressure sensor (120);
the alarm device is electrically connected with the controller,
the first piston braking part and the second piston braking part can be clamped with two sides of the brake disc under the action of hydraulic oil in the hydraulic oil way so as to realize braking;
further comprises:
the two sides of the first return device are respectively connected with the first piston braking part and the shell (10);
the two sides of the second return device are respectively connected with the second piston braking part and the shell (10),
when the first piston braking part and the second piston braking part are clamped with two sides of the brake disc, the deformation of the first return device and the second return device is increased; after the hydraulic oil way is depressurized, the first return device and the second return device can recover deformation and drive the first piston braking part and the second piston braking part to move in a direction away from the brake disc;
the first return means comprises:
the first limiting block is movably arranged in the first return groove; the two ends of the first elastic piece (52) are respectively abutted with the first limiting block and the side wall of the first return groove, wherein during braking, the first limiting block is limited by the shell (10) and matched with a first piston braking part to press the first elastic piece (52);
the first stopper includes: the first sub-limiting block (511) and the second sub-limiting block (512) are semi-annular, the first sub-limiting block (511) and the second sub-limiting block (512) are abutted against the bottom of the shell (10) and the bottom of the first return groove in the radial direction of the first piston braking part, the first sub-limiting block (511) and the second sub-limiting block (512) are abutted against the axial direction of the first piston braking part to be spliced into an annular first limiting block, the first sub-limiting block (511) and the second sub-limiting block (512) are abutted against the first elastic piece (52), and the first sub-limiting block (511) and the second sub-limiting block (512) are abutted against each other in the circumferential direction of the first piston braking part;
the second return means comprises:
the second limiting block is movably arranged in the second return groove;
two ends of the second elastic piece (62) are respectively abutted with the side wall of the second limiting block and the side wall of the second return groove,
wherein, during braking, the second limiting block is limited by the shell (10) and is matched with a second piston braking part to press the second elastic piece (62);
the second stopper includes: the third sub-limiting block (611) and the fourth sub-limiting block (612) are semi-annular, the third sub-limiting block (611) and the fourth sub-limiting block (612) are abutted against the bottoms of the second caliper body (12) and the second return groove in the radial direction of the second piston braking part, and the third sub-limiting block (611) and the fourth sub-limiting block (612) are abutted against the circumference of the second piston braking part so as to splice out the annular second limiting block, wherein the third sub-limiting block (611) and the fourth sub-limiting block (612) are abutted against the first elastic piece (52).
2. The disc brake of claim 1, further comprising:
the first position sensor (130) is fixedly arranged on the shell (10) and arranged on one side of the first piston braking part far away from the brake disc, and the first position sensor (130) is electrically connected with the controller.
3. The disc brake of claim 2, further comprising:
the second position sensor is fixedly arranged on the shell (10) and arranged on one side of the second piston braking part far away from the braking disc, and the second position sensor is electrically connected with the controller.
4. Disc brake according to claim 1, characterized in that the housing (10) comprises:
a first caliper body (11), the first piston braking part being slidably arranged in the first caliper body (11);
the second caliper body (12) is fixedly connected with the first caliper body (11), the second piston braking part is arranged in the second caliper body (12) in a sliding way,
the first caliper body (11) is internally provided with a first check ring (111), and two sides of the first limiting block are respectively abutted against the first check ring (111) and the first elastic piece (52).
5. A disc brake according to claim 4, wherein,
a second check ring (121) is arranged in the second caliper body (12), and one side, away from the second piston braking part, of the second limiting block is abutted against the second check ring (121).
6. A control method for a disc brake according to any one of claims 1 to 5, comprising:
acquiring the oil pressure in the hydraulic oil way through a pressure sensor (120);
when the oil pressure is larger than a first preset value, the controller controls the alarm device to send out first alarm information.
7. The control method according to claim 6, wherein when the disc brake is provided with a first position sensor (130), the control method further comprises:
acquiring a stroke value of the first piston brake by the first position sensor (130);
and when the travel value is larger than a second preset value, the controller controls the alarm device to send out second alarm information.
CN201910646881.7A 2019-07-17 2019-07-17 Disc brake and control method Active CN110345177B (en)

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CN112628312B (en) * 2020-12-17 2023-04-07 山西江淮重工有限责任公司 Floating type yaw brake

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JPS58131438A (en) * 1982-01-29 1983-08-05 Hino Motors Ltd Abrasion loss detector for brake lining
GB9616057D0 (en) * 1996-07-31 1996-09-11 White Edward L Adjustable anti-drag disc brake system
KR19980054397U (en) * 1996-12-31 1998-10-07 박병재 Automotive brake pad wear alarm device
CN201129386Y (en) * 2007-12-04 2008-10-08 吴国新 Hoister brake-shoe performance synthesis detector
WO2012017373A1 (en) * 2010-08-03 2012-02-09 Faic S.R.L. Clamping collar
CN201834649U (en) * 2010-09-30 2011-05-18 北京工业大学 State monitoring device for disc brake of mining hoist
CN102141475A (en) * 2010-12-29 2011-08-03 上海电机学院 State detection device of wind-driven generator brake
FR2986050A1 (en) * 2012-01-24 2013-07-26 Peugeot Citroen Automobiles Sa Disk brake for wheel of vehicle e.g. car, has measurement device to measure displacement of piston when brake pads are moved from rest position to braking position, and indicator to indicate state of wear of brake pads from measurement
CN203560398U (en) * 2013-09-29 2014-04-23 长城汽车股份有限公司 Split type thrust gasket structure
CN105299102A (en) * 2015-08-11 2016-02-03 张泽伟 Automobile smart brake pad
CN107725639A (en) * 2017-11-28 2018-02-23 宋建毅 A kind of disc brake with fixed caliper
CN208153583U (en) * 2018-02-16 2018-11-27 天津市强龙汽车部件有限公司 A kind of improved automotive braking clamp
CN210290546U (en) * 2019-07-17 2020-04-10 雷沃重工股份有限公司 Disc brake

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